X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/c91ffeae22ab1c7d6714f0935a51030d088a5f5c..HEAD:/print-ospf6.c diff --git a/print-ospf6.c b/print-ospf6.c index 98334afe..c6f5f67d 100644 --- a/print-ospf6.c +++ b/print-ospf6.c @@ -21,16 +21,15 @@ * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu) */ -#define NETDISSECT_REWORKED -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif +/* \summary: IPv6 Open Shortest Path First (OSPFv3) printer */ + +#include -#include +#include "netdissect-stdinc.h" #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" #include "extract.h" @@ -94,7 +93,7 @@ #define RLA_FLAG_E 0x02 #define RLA_FLAG_V 0x04 #define RLA_FLAG_W 0x08 -#define RLA_FLAG_N 0x10 +#define RLA_FLAG_Nt 0x10 /* lsa_prefix options */ #define LSA_PREFIX_OPT_NU 0x01 @@ -102,6 +101,7 @@ #define LSA_PREFIX_OPT_MC 0x04 #define LSA_PREFIX_OPT_P 0x08 #define LSA_PREFIX_OPT_DN 0x10 +#define LSA_PREFIX_OPT_N 0x20 /* sla_tosmetric breakdown */ #define SLA_MASK_TOS 0x7f000000 @@ -117,24 +117,27 @@ #define OSPF6_AT_HDRLEN 16U #define OSPF6_AUTH_TYPE_HMAC 0x0001 -typedef u_int32_t rtrid_t; +typedef nd_uint32_t rtrid_t; /* link state advertisement header */ struct lsa6_hdr { - u_int16_t ls_age; - u_int16_t ls_type; + nd_uint16_t ls_age; + nd_uint16_t ls_type; rtrid_t ls_stateid; rtrid_t ls_router; - u_int32_t ls_seq; - u_int16_t ls_chksum; - u_int16_t ls_length; + nd_uint32_t ls_seq; + nd_uint16_t ls_chksum; + nd_uint16_t ls_length; }; +/* Length of an IPv6 address, in bytes. */ +#define IPV6_ADDR_LEN_BYTES (128/8) + struct lsa6_prefix { - u_int8_t lsa_p_len; - u_int8_t lsa_p_opt; - u_int16_t lsa_p_metric; - u_int8_t lsa_p_prefix[4]; + nd_uint8_t lsa_p_len; + nd_uint8_t lsa_p_opt; + nd_uint16_t lsa_p_metric; + nd_byte lsa_p_prefix[IPV6_ADDR_LEN_BYTES]; /* maximum length */ }; /* link state advertisement */ @@ -146,36 +149,36 @@ struct lsa6 { /* Router links advertisements */ struct { union { - u_int8_t flg; - u_int32_t opt; + nd_uint8_t flg; + nd_uint32_t opt; } rla_flgandopt; #define rla_flags rla_flgandopt.flg #define rla_options rla_flgandopt.opt struct rlalink6 { - u_int8_t link_type; - u_int8_t link_zero[1]; - u_int16_t link_metric; - u_int32_t link_ifid; - u_int32_t link_nifid; + nd_uint8_t link_type; + nd_byte link_zero; + nd_uint16_t link_metric; + nd_uint32_t link_ifid; + nd_uint32_t link_nifid; rtrid_t link_nrtid; } rla_link[1]; /* may repeat */ } un_rla; /* Network links advertisements */ struct { - u_int32_t nla_options; + nd_uint32_t nla_options; rtrid_t nla_router[1]; /* may repeat */ } un_nla; /* Inter Area Prefix LSA */ struct { - u_int32_t inter_ap_metric; + nd_uint32_t inter_ap_metric; struct lsa6_prefix inter_ap_prefix[1]; } un_inter_ap; /* AS external links advertisements */ struct { - u_int32_t asla_metric; + nd_uint32_t asla_metric; struct lsa6_prefix asla_prefix[1]; /* some optional fields follow */ } un_asla; @@ -183,14 +186,14 @@ struct lsa6 { #if 0 /* Summary links advertisements */ struct { - struct in_addr sla_mask; - u_int32_t sla_tosmetric[1]; /* may repeat */ + nd_ipv4 sla_mask; + nd_uint32_t sla_tosmetric[1]; /* may repeat */ } un_sla; /* Multicast group membership */ struct mcla { - u_int32_t mcla_vtype; - struct in_addr mcla_vid; + nd_uint32_t mcla_vtype; + nd_ipv4 mcla_vid; } un_mcla[1]; #endif @@ -199,20 +202,20 @@ struct lsa6 { /* Link LSA */ struct llsa { union { - u_int8_t pri; - u_int32_t opt; + nd_uint8_t pri; + nd_uint32_t opt; } llsa_priandopt; #define llsa_priority llsa_priandopt.pri #define llsa_options llsa_priandopt.opt - struct in6_addr llsa_lladdr; - u_int32_t llsa_nprefix; + nd_ipv6 llsa_lladdr; + nd_uint32_t llsa_nprefix; struct lsa6_prefix llsa_prefix[1]; } un_llsa; /* Intra-Area-Prefix */ struct { - u_int16_t intra_ap_nprefix; - u_int16_t intra_ap_lstype; + nd_uint16_t intra_ap_nprefix; + nd_uint16_t intra_ap_lstype; rtrid_t intra_ap_lsid; rtrid_t intra_ap_rtid; struct lsa6_prefix intra_ap_prefix[1]; @@ -224,70 +227,62 @@ struct lsa6 { * the main header */ struct ospf6hdr { - u_int8_t ospf6_version; - u_int8_t ospf6_type; - u_int16_t ospf6_len; + nd_uint8_t ospf6_version; + nd_uint8_t ospf6_type; + nd_uint16_t ospf6_len; rtrid_t ospf6_routerid; rtrid_t ospf6_areaid; - u_int16_t ospf6_chksum; - u_int8_t ospf6_instanceid; - u_int8_t ospf6_rsvd; - union { + nd_uint16_t ospf6_chksum; + nd_uint8_t ospf6_instanceid; + nd_uint8_t ospf6_rsvd; +}; - /* Hello packet */ - struct { - u_int32_t hello_ifid; - union { - u_int8_t pri; - u_int32_t opt; - } hello_priandopt; +/* + * The OSPF6 header length is 16 bytes, regardless of how your compiler + * might choose to pad the above structure. + */ +#define OSPF6HDR_LEN 16 + +/* Hello packet */ +struct hello6 { + nd_uint32_t hello_ifid; + union { + nd_uint8_t pri; + nd_uint32_t opt; + } hello_priandopt; #define hello_priority hello_priandopt.pri #define hello_options hello_priandopt.opt - u_int16_t hello_helloint; - u_int16_t hello_deadint; - rtrid_t hello_dr; - rtrid_t hello_bdr; - rtrid_t hello_neighbor[1]; /* may repeat */ - } un_hello; - - /* Database Description packet */ - struct { - u_int32_t db_options; - u_int16_t db_mtu; - u_int8_t db_mbz; - u_int8_t db_flags; - u_int32_t db_seq; - struct lsa6_hdr db_lshdr[1]; /* may repeat */ - } un_db; - - /* Link State Request */ - struct lsr6 { - u_int16_t ls_mbz; - u_int16_t ls_type; - rtrid_t ls_stateid; - rtrid_t ls_router; - } un_lsr[1]; /* may repeat */ - - /* Link State Update */ - struct { - u_int32_t lsu_count; - struct lsa6 lsu_lsa[1]; /* may repeat */ - } un_lsu; + nd_uint16_t hello_helloint; + nd_uint16_t hello_deadint; + rtrid_t hello_dr; + rtrid_t hello_bdr; + rtrid_t hello_neighbor[1]; /* may repeat */ +}; - /* Link State Acknowledgement */ - struct { - struct lsa6_hdr lsa_lshdr[1]; /* may repeat */ - } un_lsa ; - } ospf6_un ; +/* Database Description packet */ +struct dd6 { + nd_uint32_t db_options; + nd_uint16_t db_mtu; + nd_uint8_t db_mbz; + nd_uint8_t db_flags; + nd_uint32_t db_seq; + struct lsa6_hdr db_lshdr[1]; /* may repeat */ }; -#define ospf6_hello ospf6_un.un_hello -#define ospf6_db ospf6_un.un_db -#define ospf6_lsr ospf6_un.un_lsr -#define ospf6_lsu ospf6_un.un_lsu -#define ospf6_lsa ospf6_un.un_lsa +/* Link State Request */ +struct lsr6 { + nd_uint16_t ls_mbz; + nd_uint16_t ls_type; + rtrid_t ls_stateid; + rtrid_t ls_router; +}; + +/* Link State Update */ +struct lsu6 { + nd_uint32_t lsu_count; + struct lsa6 lsu_lsa[1]; /* may repeat */ +}; -static const char tstr[] = " [|ospf3]"; static const struct tok ospf6_option_values[] = { { OSPF6_OPTION_V6, "V6" }, @@ -306,8 +301,8 @@ static const struct tok ospf6_rla_flag_values[] = { { RLA_FLAG_B, "ABR" }, { RLA_FLAG_E, "External" }, { RLA_FLAG_V, "Virtual-Link Endpoint" }, - { RLA_FLAG_W, "Wildcard Receiver" }, - { RLA_FLAG_N, "NSSA Translator" }, + { RLA_FLAG_W, "Deprecated" }, + { RLA_FLAG_Nt, "NSSA Translator" }, { 0, NULL } }; @@ -366,6 +361,7 @@ static const struct tok ospf6_lsa_prefix_option_values[] = { { LSA_PREFIX_OPT_MC, "Deprecated" }, { LSA_PREFIX_OPT_P, "Propagate" }, { LSA_PREFIX_OPT_DN, "Down" }, + { LSA_PREFIX_OPT_N, "N-bit" }, { 0, NULL } }; @@ -376,32 +372,40 @@ static const struct tok ospf6_auth_type_str[] = { static void ospf6_print_ls_type(netdissect_options *ndo, - register u_int ls_type, register const rtrid_t *ls_stateid) + u_int ls_type, const rtrid_t *ls_stateid) { - ND_PRINT((ndo, "\n\t %s LSA (%d), %s Scope%s, LSA-ID %s", + ND_PRINT("\n\t %s LSA (%u), %s Scope%s, LSA-ID %s", tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK), ls_type & LS_TYPE_MASK, tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK), ls_type &0x8000 ? ", transitive" : "", /* U-bit */ - ipaddr_string(ls_stateid))); + GET_IPADDR_STRING(ls_stateid)); } static int ospf6_print_lshdr(netdissect_options *ndo, - register const struct lsa6_hdr *lshp, const u_char *dataend) + const struct lsa6_hdr *lshp, const u_char *dataend) { - if ((u_char *)(lshp + 1) > dataend) + u_int ls_length; + + if ((const u_char *)(lshp + 1) > dataend) goto trunc; - ND_TCHECK(lshp->ls_type); - ND_TCHECK(lshp->ls_seq); - ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", - ipaddr_string(&lshp->ls_router), - EXTRACT_32BITS(&lshp->ls_seq), - EXTRACT_16BITS(&lshp->ls_age), - EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr))); + ls_length = GET_BE_U_2(lshp->ls_length); + if (ls_length < sizeof(struct lsa_hdr)) { + ND_PRINT("\n\t Bogus length %u < header (%zu)", ls_length, + sizeof(struct lsa_hdr)); + goto trunc; + } - ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid); + ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %zu", + GET_IPADDR_STRING(lshp->ls_router), + GET_BE_U_4(lshp->ls_seq), + GET_BE_U_2(lshp->ls_age), + ls_length-sizeof(struct lsa6_hdr)); + + ospf6_print_ls_type(ndo, GET_BE_U_2(lshp->ls_type), + &lshp->ls_stateid); return (0); trunc: @@ -410,36 +414,35 @@ trunc: static int ospf6_print_lsaprefix(netdissect_options *ndo, - const u_int8_t *tptr, u_int lsa_length) + const uint8_t *tptr, u_int lsa_length) { - const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr; + const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr; u_int wordlen; - struct in6_addr prefix; + nd_ipv6 prefix; - if (lsa_length < sizeof (*lsapp) - 4) + if (lsa_length < sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES) goto trunc; - lsa_length -= sizeof (*lsapp) - 4; - ND_TCHECK2(*lsapp, sizeof (*lsapp) - 4); - wordlen = (lsapp->lsa_p_len + 31) / 32; - if (wordlen * 4 > sizeof(struct in6_addr)) { - ND_PRINT((ndo, " bogus prefixlen /%d", lsapp->lsa_p_len)); + lsa_length -= sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES; + ND_TCHECK_LEN(lsapp, sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES); + wordlen = (GET_U_1(lsapp->lsa_p_len) + 31) / 32; + if (wordlen * 4 > sizeof(nd_ipv6)) { + ND_PRINT(" bogus prefixlen /%u", GET_U_1(lsapp->lsa_p_len)); goto trunc; } if (lsa_length < wordlen * 4) goto trunc; lsa_length -= wordlen * 4; - ND_TCHECK2(lsapp->lsa_p_prefix, wordlen * 4); - memset(&prefix, 0, sizeof(prefix)); - memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4); - ND_PRINT((ndo, "\n\t\t%s/%d", ip6addr_string(&prefix), - lsapp->lsa_p_len)); - if (lsapp->lsa_p_opt) { - ND_PRINT((ndo, ", Options [%s]", + memset(prefix, 0, sizeof(prefix)); + GET_CPY_BYTES(prefix, lsapp->lsa_p_prefix, wordlen * 4); + ND_PRINT("\n\t\t%s/%u", ip6addr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */ + GET_U_1(lsapp->lsa_p_len)); + if (GET_U_1(lsapp->lsa_p_opt)) { + ND_PRINT(", Options [%s]", bittok2str(ospf6_lsa_prefix_option_values, - "none", lsapp->lsa_p_opt))); + "none", GET_U_1(lsapp->lsa_p_opt))); } - ND_PRINT((ndo, ", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric))); - return sizeof(*lsapp) - 4 + wordlen * 4; + ND_PRINT(", metric %u", GET_BE_U_2(lsapp->lsa_p_metric)); + return sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES + wordlen * 4; trunc: return -1; @@ -451,32 +454,31 @@ trunc: */ static int ospf6_print_lsa(netdissect_options *ndo, - register const struct lsa6 *lsap, const u_char *dataend) + const struct lsa6 *lsap, const u_char *dataend) { - register const struct rlalink6 *rlp; + const struct rlalink6 *rlp; #if 0 - register const struct tos_metric *tosp; + const struct tos_metric *tosp; #endif - register const rtrid_t *ap; + const rtrid_t *ap; #if 0 - register const struct aslametric *almp; - register const struct mcla *mcp; + const struct aslametric *almp; + const struct mcla *mcp; #endif - register const struct llsa *llsap; - register const struct lsa6_prefix *lsapp; + const struct llsa *llsap; + const struct lsa6_prefix *lsapp; #if 0 - register const u_int32_t *lp; + const uint32_t *lp; #endif - register u_int prefixes; - register int bytelen; - register u_int length, lsa_length; - u_int32_t flags32; - const u_int8_t *tptr; + u_int prefixes; + int bytelen; + u_int length, lsa_length; + uint32_t flags32; + const uint8_t *tptr; if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend)) return (1); - ND_TCHECK(lsap->ls_hdr.ls_length); - length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length); + length = GET_BE_U_2(lsap->ls_hdr.ls_length); /* * The LSA length includes the length of the header; @@ -484,62 +486,61 @@ ospf6_print_lsa(netdissect_options *ndo, * If it does, find the length of what follows the * header. */ - if (length < sizeof(struct lsa6_hdr) || (u_char *)lsap + length > dataend) - return (1); + if (length < sizeof(struct lsa6_hdr) || (const u_char *)lsap + length > dataend) + return (1); lsa_length = length - sizeof(struct lsa6_hdr); - tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr); + tptr = (const uint8_t *)lsap+sizeof(struct lsa6_hdr); - switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) { + switch (GET_BE_U_2(lsap->ls_hdr.ls_type)) { case LS_TYPE_ROUTER | LS_SCOPE_AREA: if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options); - ND_TCHECK(lsap->lsa_un.un_rla.rla_options); - ND_PRINT((ndo, "\n\t Options [%s]", + ND_PRINT("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", - EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)))); - ND_PRINT((ndo, ", RLA-Flags [%s]", + GET_BE_U_4(lsap->lsa_un.un_rla.rla_options))); + ND_PRINT(", RLA-Flags [%s]", bittok2str(ospf6_rla_flag_values, "none", - lsap->lsa_un.un_rla.rla_flags))); + GET_U_1(lsap->lsa_un.un_rla.rla_flags))); rlp = lsap->lsa_un.un_rla.rla_link; while (lsa_length != 0) { if (lsa_length < sizeof (*rlp)) return (1); lsa_length -= sizeof (*rlp); - ND_TCHECK(*rlp); - switch (rlp->link_type) { + ND_TCHECK_SIZE(rlp); + switch (GET_U_1(rlp->link_type)) { case RLA_TYPE_VIRTUAL: - ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID %s" + ND_PRINT("\n\t Virtual Link: Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", - ipaddr_string(&rlp->link_nrtid), - ipaddr_string(&rlp->link_nifid), - ipaddr_string(&rlp->link_ifid))); + GET_IPADDR_STRING(rlp->link_nrtid), + GET_IPADDR_STRING(rlp->link_nifid), + GET_IPADDR_STRING(rlp->link_ifid)); break; case RLA_TYPE_ROUTER: - ND_PRINT((ndo, "\n\t Neighbor Router-ID %s" + ND_PRINT("\n\t Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", - ipaddr_string(&rlp->link_nrtid), - ipaddr_string(&rlp->link_nifid), - ipaddr_string(&rlp->link_ifid))); + GET_IPADDR_STRING(rlp->link_nrtid), + GET_IPADDR_STRING(rlp->link_nifid), + GET_IPADDR_STRING(rlp->link_ifid)); break; case RLA_TYPE_TRANSIT: - ND_PRINT((ndo, "\n\t Neighbor Network-ID %s" + ND_PRINT("\n\t Neighbor Network-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", - ipaddr_string(&rlp->link_nrtid), - ipaddr_string(&rlp->link_nifid), - ipaddr_string(&rlp->link_ifid))); + GET_IPADDR_STRING(rlp->link_nrtid), + GET_IPADDR_STRING(rlp->link_nifid), + GET_IPADDR_STRING(rlp->link_ifid)); break; default: - ND_PRINT((ndo, "\n\t Unknown Router Links Type 0x%02x", - rlp->link_type)); + ND_PRINT("\n\t Unknown Router Links Type 0x%02x", + GET_U_1(rlp->link_type)); return (0); } - ND_PRINT((ndo, ", metric %d", EXTRACT_16BITS(&rlp->link_metric))); + ND_PRINT(", metric %u", GET_BE_U_2(rlp->link_metric)); rlp++; } break; @@ -548,19 +549,17 @@ ospf6_print_lsa(netdissect_options *ndo, if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options); - ND_TCHECK(lsap->lsa_un.un_nla.nla_options); - ND_PRINT((ndo, "\n\t Options [%s]", + ND_PRINT("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", - EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)))); + GET_BE_U_4(lsap->lsa_un.un_nla.nla_options))); - ND_PRINT((ndo, "\n\t Connected Routers:")); + ND_PRINT("\n\t Connected Routers:"); ap = lsap->lsa_un.un_nla.nla_router; while (lsa_length != 0) { if (lsa_length < sizeof (*ap)) return (1); lsa_length -= sizeof (*ap); - ND_TCHECK(*ap); - ND_PRINT((ndo, "\n\t\t%s", ipaddr_string(ap))); + ND_PRINT("\n\t\t%s", GET_IPADDR_STRING(ap)); ++ap; } break; @@ -569,15 +568,19 @@ ospf6_print_lsa(netdissect_options *ndo, if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric); - ND_TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric); - ND_PRINT((ndo, ", metric %u", - EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC)); + ND_PRINT(", metric %u", + GET_BE_U_4(lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC); - tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix; + tptr = (const uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix; while (lsa_length != 0) { bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length); if (bytelen < 0) goto trunc; + /* + * ospf6_print_lsaprefix() will return -1 if + * the length is too high, so this will not + * underflow. + */ lsa_length -= bytelen; tptr += bytelen; } @@ -587,53 +590,51 @@ ospf6_print_lsa(netdissect_options *ndo, if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric); - ND_TCHECK(lsap->lsa_un.un_asla.asla_metric); - flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric); - ND_PRINT((ndo, "\n\t Flags [%s]", - bittok2str(ospf6_asla_flag_values, "none", flags32))); - ND_PRINT((ndo, " metric %u", - EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) & - ASLA_MASK_METRIC)); - - tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix; - lsapp = (struct lsa6_prefix *)tptr; + flags32 = GET_BE_U_4(lsap->lsa_un.un_asla.asla_metric); + ND_PRINT("\n\t Flags [%s]", + bittok2str(ospf6_asla_flag_values, "none", flags32)); + ND_PRINT(" metric %u", + GET_BE_U_4(lsap->lsa_un.un_asla.asla_metric) & + ASLA_MASK_METRIC); + + tptr = (const uint8_t *)lsap->lsa_un.un_asla.asla_prefix; + lsapp = (const struct lsa6_prefix *)tptr; bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length); if (bytelen < 0) goto trunc; + /* + * ospf6_print_lsaprefix() will return -1 if + * the length is too high, so this will not + * underflow. + */ lsa_length -= bytelen; tptr += bytelen; if ((flags32 & ASLA_FLAG_FWDADDR) != 0) { - struct in6_addr *fwdaddr6; - - fwdaddr6 = (struct in6_addr *)tptr; - if (lsa_length < sizeof (*fwdaddr6)) + if (lsa_length < sizeof (nd_ipv6)) return (1); - lsa_length -= sizeof (*fwdaddr6); - ND_TCHECK(*fwdaddr6); - ND_PRINT((ndo, " forward %s", - ip6addr_string(fwdaddr6))); - tptr += sizeof(*fwdaddr6); + lsa_length -= sizeof (nd_ipv6); + ND_PRINT(" forward %s", + GET_IP6ADDR_STRING(tptr)); + tptr += sizeof(nd_ipv6); } if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) { - if (lsa_length < sizeof (u_int32_t)) + if (lsa_length < sizeof (uint32_t)) return (1); - lsa_length -= sizeof (u_int32_t); - ND_TCHECK(*(u_int32_t *)tptr); - ND_PRINT((ndo, " tag %s", - ipaddr_string((u_int32_t *)tptr))); - tptr += sizeof(u_int32_t); + lsa_length -= sizeof (uint32_t); + ND_PRINT(" tag %s", + GET_IPADDR_STRING(tptr)); + tptr += sizeof(uint32_t); } - if (lsapp->lsa_p_metric) { - if (lsa_length < sizeof (u_int32_t)) + if (GET_U_1(lsapp->lsa_p_metric)) { + if (lsa_length < sizeof (uint32_t)) return (1); - lsa_length -= sizeof (u_int32_t); - ND_TCHECK(*(u_int32_t *)tptr); - ND_PRINT((ndo, " RefLSID: %s", - ipaddr_string((u_int32_t *)tptr))); - tptr += sizeof(u_int32_t); + lsa_length -= sizeof (uint32_t); + ND_PRINT(" RefLSID: %s", + GET_IPADDR_STRING(tptr)); + tptr += sizeof(uint32_t); } break; @@ -643,26 +644,31 @@ ospf6_print_lsa(netdissect_options *ndo, if (lsa_length < sizeof (llsap->llsa_priandopt)) return (1); lsa_length -= sizeof (llsap->llsa_priandopt); - ND_TCHECK(llsap->llsa_priandopt); - ND_PRINT((ndo, "\n\t Options [%s]", + ND_TCHECK_SIZE(&llsap->llsa_priandopt); + ND_PRINT("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", - EXTRACT_32BITS(&llsap->llsa_options)))); + GET_BE_U_4(llsap->llsa_options))); if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix)) return (1); lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix); - prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix); - ND_PRINT((ndo, "\n\t Priority %d, Link-local address %s, Prefixes %d:", - llsap->llsa_priority, - ip6addr_string(&llsap->llsa_lladdr), - prefixes)); - - tptr = (u_int8_t *)llsap->llsa_prefix; - while (prefixes > 0) { + prefixes = GET_BE_U_4(llsap->llsa_nprefix); + ND_PRINT("\n\t Priority %u, Link-local address %s, Prefixes %u:", + GET_U_1(llsap->llsa_priority), + GET_IP6ADDR_STRING(llsap->llsa_lladdr), + prefixes); + + tptr = (const uint8_t *)llsap->llsa_prefix; + while (prefixes != 0) { bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length); if (bytelen < 0) goto trunc; prefixes--; + /* + * ospf6_print_lsaprefix() will return -1 if + * the length is too high, so this will not + * underflow. + */ lsa_length -= bytelen; tptr += bytelen; } @@ -673,37 +679,41 @@ ospf6_print_lsa(netdissect_options *ndo, if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid); - ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid); + ND_TCHECK_4(lsap->lsa_un.un_intra_ap.intra_ap_rtid); ospf6_print_ls_type(ndo, - EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype), + GET_BE_U_2(lsap->lsa_un.un_intra_ap.intra_ap_lstype), &lsap->lsa_un.un_intra_ap.intra_ap_lsid); if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix); - ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); - prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix); - ND_PRINT((ndo, "\n\t Prefixes %d:", prefixes)); + prefixes = GET_BE_U_2(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); + ND_PRINT("\n\t Prefixes %u:", prefixes); - tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix; - while (prefixes > 0) { + tptr = (const uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix; + while (prefixes != 0) { bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length); if (bytelen < 0) goto trunc; prefixes--; + /* + * ospf6_print_lsaprefix() will return -1 if + * the length is too high, so this will not + * underflow. + */ lsa_length -= bytelen; tptr += bytelen; } break; case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL: - if (ospf_print_grace_lsa(tptr, lsa_length) == -1) { + if (ospf_grace_lsa_print(ndo, tptr, lsa_length) == -1) { return 1; } break; case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL: - if (ospf_print_te_lsa(tptr, lsa_length) == -1) { + if (ospf_te_lsa_print(ndo, tptr, lsa_length) == -1) { return 1; } break; @@ -724,79 +734,79 @@ trunc: static int ospf6_decode_v3(netdissect_options *ndo, - register const struct ospf6hdr *op, - register const u_char *dataend) + const struct ospf6hdr *op, + const u_char *dataend) { - register const rtrid_t *ap; - register const struct lsr6 *lsrp; - register const struct lsa6_hdr *lshp; - register const struct lsa6 *lsap; - register int i; + const rtrid_t *ap; + const struct lsr6 *lsrp; + const struct lsa6_hdr *lshp; + const struct lsa6 *lsap; + uint32_t i; + + switch (GET_U_1(op->ospf6_type)) { - switch (op->ospf6_type) { + case OSPF_TYPE_HELLO: { + const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN); - case OSPF_TYPE_HELLO: - ND_PRINT((ndo, "\n\tOptions [%s]", + ND_PRINT("\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", - EXTRACT_32BITS(&op->ospf6_hello.hello_options)))); - - ND_TCHECK(op->ospf6_hello.hello_deadint); - ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u", - EXTRACT_16BITS(&op->ospf6_hello.hello_helloint), - EXTRACT_16BITS(&op->ospf6_hello.hello_deadint), - ipaddr_string(&op->ospf6_hello.hello_ifid), - op->ospf6_hello.hello_priority)); - - ND_TCHECK(op->ospf6_hello.hello_dr); - if (op->ospf6_hello.hello_dr != 0) - ND_PRINT((ndo, "\n\t Designated Router %s", - ipaddr_string(&op->ospf6_hello.hello_dr))); - ND_TCHECK(op->ospf6_hello.hello_bdr); - if (op->ospf6_hello.hello_bdr != 0) - ND_PRINT((ndo, ", Backup Designated Router %s", - ipaddr_string(&op->ospf6_hello.hello_bdr))); + GET_BE_U_4(hellop->hello_options))); + + ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u", + GET_BE_U_2(hellop->hello_helloint), + GET_BE_U_2(hellop->hello_deadint), + GET_IPADDR_STRING(hellop->hello_ifid), + GET_U_1(hellop->hello_priority)); + + if (GET_BE_U_4(hellop->hello_dr) != 0) + ND_PRINT("\n\t Designated Router %s", + GET_IPADDR_STRING(hellop->hello_dr)); + if (GET_BE_U_4(hellop->hello_bdr) != 0) + ND_PRINT(", Backup Designated Router %s", + GET_IPADDR_STRING(hellop->hello_bdr)); if (ndo->ndo_vflag > 1) { - ND_PRINT((ndo, "\n\t Neighbor List:")); - ap = op->ospf6_hello.hello_neighbor; - while ((u_char *)ap < dataend) { - ND_TCHECK(*ap); - ND_PRINT((ndo, "\n\t %s", ipaddr_string(ap))); + ND_PRINT("\n\t Neighbor List:"); + ap = hellop->hello_neighbor; + while ((const u_char *)ap < dataend) { + ND_PRINT("\n\t %s", GET_IPADDR_STRING(ap)); ++ap; } } break; /* HELLO */ + } + + case OSPF_TYPE_DD: { + const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN); - case OSPF_TYPE_DD: - ND_TCHECK(op->ospf6_db.db_options); - ND_PRINT((ndo, "\n\tOptions [%s]", + ND_PRINT("\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", - EXTRACT_32BITS(&op->ospf6_db.db_options)))); - ND_TCHECK(op->ospf6_db.db_flags); - ND_PRINT((ndo, ", DD Flags [%s]", - bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags))); - - ND_TCHECK(op->ospf6_db.db_seq); - ND_PRINT((ndo, ", MTU %u, DD-Sequence 0x%08x", - EXTRACT_16BITS(&op->ospf6_db.db_mtu), - EXTRACT_32BITS(&op->ospf6_db.db_seq))); + GET_BE_U_4(ddp->db_options))); + ND_PRINT(", DD Flags [%s]", + bittok2str(ospf6_dd_flag_values,"none",GET_U_1(ddp->db_flags))); + + ND_PRINT(", MTU %u, DD-Sequence 0x%08x", + GET_BE_U_2(ddp->db_mtu), + GET_BE_U_4(ddp->db_seq)); if (ndo->ndo_vflag > 1) { /* Print all the LS adv's */ - lshp = op->ospf6_db.db_lshdr; - while ((u_char *)lshp < dataend) { + lshp = ddp->db_lshdr; + while ((const u_char *)lshp < dataend) { if (ospf6_print_lshdr(ndo, lshp++, dataend)) goto trunc; } } break; + } case OSPF_TYPE_LS_REQ: if (ndo->ndo_vflag > 1) { - lsrp = op->ospf6_lsr; - while ((u_char *)lsrp < dataend) { - ND_TCHECK(*lsrp); - ND_PRINT((ndo, "\n\t Advertising Router %s", - ipaddr_string(&lsrp->ls_router))); - ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lsrp->ls_type), + lsrp = (const struct lsr6 *)((const uint8_t *)op + OSPF6HDR_LEN); + while ((const u_char *)lsrp < dataend) { + ND_TCHECK_SIZE(lsrp); + ND_PRINT("\n\t Advertising Router %s", + GET_IPADDR_STRING(lsrp->ls_router)); + ospf6_print_ls_type(ndo, + GET_BE_U_2(lsrp->ls_type), &lsrp->ls_stateid); ++lsrp; } @@ -805,23 +815,23 @@ ospf6_decode_v3(netdissect_options *ndo, case OSPF_TYPE_LS_UPDATE: if (ndo->ndo_vflag > 1) { - lsap = op->ospf6_lsu.lsu_lsa; - ND_TCHECK(op->ospf6_lsu.lsu_count); - i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count); - while ((u_char *)lsap < dataend && i--) { + const struct lsu6 *lsup = (const struct lsu6 *)((const uint8_t *)op + OSPF6HDR_LEN); + + i = GET_BE_U_4(lsup->lsu_count); + lsap = lsup->lsu_lsa; + while ((const u_char *)lsap < dataend && i--) { if (ospf6_print_lsa(ndo, lsap, dataend)) goto trunc; - lsap = (struct lsa6 *)((u_char *)lsap + - EXTRACT_16BITS(&lsap->ls_hdr.ls_length)); + lsap = (const struct lsa6 *)((const u_char *)lsap + + GET_BE_U_2(lsap->ls_hdr.ls_length)); } } break; - case OSPF_TYPE_LS_ACK: if (ndo->ndo_vflag > 1) { - lshp = op->ospf6_lsa.lsa_lshdr; - while ((u_char *)lshp < dataend) { + lshp = (const struct lsa6_hdr *)((const uint8_t *)op + OSPF6HDR_LEN); + while ((const u_char *)lshp < dataend) { if (ospf6_print_lshdr(ndo, lshp++, dataend)) goto trunc; } @@ -848,18 +858,16 @@ ospf6_print_lls(netdissect_options *ndo, if (len < OSPF_LLS_HDRLEN) goto trunc; /* Checksum */ - ND_TCHECK2(*cp, 2); - ND_PRINT((ndo, "\n\tLLS Checksum 0x%04x", EXTRACT_16BITS(cp))); + ND_PRINT("\n\tLLS Checksum 0x%04x", GET_BE_U_2(cp)); cp += 2; /* LLS Data Length */ - ND_TCHECK2(*cp, 2); - llsdatalen = EXTRACT_16BITS(cp); - ND_PRINT((ndo, ", Data Length %u", llsdatalen)); + llsdatalen = GET_BE_U_2(cp); + ND_PRINT(", Data Length %u", llsdatalen); if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len) goto trunc; cp += 2; /* LLS TLVs */ - ND_TCHECK2(*cp, llsdatalen - OSPF_LLS_HDRLEN); + ND_TCHECK_LEN(cp, llsdatalen - OSPF_LLS_HDRLEN); /* FIXME: code in print-ospf.c can be reused to decode the TLVs */ return llsdatalen; @@ -879,33 +887,28 @@ ospf6_decode_at(netdissect_options *ndo, if (len < OSPF6_AT_HDRLEN) goto trunc; /* Authentication Type */ - ND_TCHECK2(*cp, 2); - ND_PRINT((ndo, "\n\tAuthentication Type %s", tok2str(ospf6_auth_type_str, "unknown (0x%04x)", EXTRACT_16BITS(cp)))); + ND_PRINT("\n\tAuthentication Type %s", + tok2str(ospf6_auth_type_str, "unknown (0x%04x)", GET_BE_U_2(cp))); cp += 2; /* Auth Data Len */ - ND_TCHECK2(*cp, 2); - authdatalen = EXTRACT_16BITS(cp); - ND_PRINT((ndo, ", Length %u", authdatalen)); + authdatalen = GET_BE_U_2(cp); + ND_PRINT(", Length %u", authdatalen); if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len) goto trunc; cp += 2; /* Reserved */ - ND_TCHECK2(*cp, 2); cp += 2; /* Security Association ID */ - ND_TCHECK2(*cp, 2); - ND_PRINT((ndo, ", SAID %u", EXTRACT_16BITS(cp))); + ND_PRINT(", SAID %u", GET_BE_U_2(cp)); cp += 2; /* Cryptographic Sequence Number (High-Order 32 Bits) */ - ND_TCHECK2(*cp, 4); - ND_PRINT((ndo, ", CSN 0x%08x", EXTRACT_32BITS(cp))); + ND_PRINT(", CSN 0x%08x", GET_BE_U_4(cp)); cp += 4; /* Cryptographic Sequence Number (Low-Order 32 Bits) */ - ND_TCHECK2(*cp, 4); - ND_PRINT((ndo, ":%08x", EXTRACT_32BITS(cp))); + ND_PRINT(":%08x", GET_BE_U_4(cp)); cp += 4; /* Authentication Data */ - ND_TCHECK2(*cp, authdatalen - OSPF6_AT_HDRLEN); + ND_TCHECK_LEN(cp, authdatalen - OSPF6_AT_HDRLEN); if (ndo->ndo_vflag > 1) print_unknown_data(ndo,cp, "\n\tAuthentication Data ", authdatalen - OSPF6_AT_HDRLEN); return 0; @@ -923,12 +926,21 @@ static int ospf6_decode_v3_trailer(netdissect_options *ndo, const struct ospf6hdr *op, const u_char *cp, const unsigned len) { + uint8_t type; int llslen = 0; - u_char lls_hello = op->ospf6_type == OSPF_TYPE_HELLO && - op->ospf6_hello.hello_options & OSPF6_OPTION_L; - u_char lls_dd = op->ospf6_type == OSPF_TYPE_DD && - op->ospf6_db.db_options & OSPF6_OPTION_L; - + int lls_hello = 0; + int lls_dd = 0; + + type = GET_U_1(op->ospf6_type); + if (type == OSPF_TYPE_HELLO) { + const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN); + if (GET_BE_U_4(hellop->hello_options) & OSPF6_OPTION_L) + lls_hello = 1; + } else if (type == OSPF_TYPE_DD) { + const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN); + if (GET_BE_U_4(ddp->db_options) & OSPF6_OPTION_L) + lls_dd = 1; + } if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(ndo, cp, len)) < 0) goto trunc; return ospf6_decode_at(ndo, cp + llslen, len - llslen); @@ -939,20 +951,22 @@ trunc: void ospf6_print(netdissect_options *ndo, - register const u_char *bp, register u_int length) + const u_char *bp, u_int length) { - register const struct ospf6hdr *op; - register const u_char *dataend; - register const char *cp; + const struct ospf6hdr *op; + const u_char *dataend; + const char *cp; uint16_t datalen; - op = (struct ospf6hdr *)bp; + ndo->ndo_protocol = "ospf3"; + op = (const struct ospf6hdr *)bp; /* If the type is valid translate it, or just print the type */ /* value. If it's not valid, say so and return */ - ND_TCHECK(op->ospf6_type); - cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type); - ND_PRINT((ndo, "OSPFv%u, %s, length %d", op->ospf6_version, cp, length)); + cp = tok2str(ospf6_type_values, "unknown packet type (%u)", + GET_U_1(op->ospf6_type)); + ND_PRINT("OSPFv%u, %s, length %u", GET_U_1(op->ospf6_version), cp, + length); if (*cp == 'u') { return; } @@ -962,28 +976,24 @@ ospf6_print(netdissect_options *ndo, } /* OSPFv3 data always comes first and optional trailing data may follow. */ - ND_TCHECK(op->ospf6_len); - datalen = EXTRACT_16BITS(&op->ospf6_len); + datalen = GET_BE_U_2(op->ospf6_len); if (datalen > length) { - ND_PRINT((ndo, " [len %d]", datalen)); + ND_PRINT(" [len %u]", datalen); return; } dataend = bp + datalen; - ND_TCHECK(op->ospf6_routerid); - ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid))); + ND_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf6_routerid)); - ND_TCHECK(op->ospf6_areaid); - if (op->ospf6_areaid != 0) - ND_PRINT((ndo, ", Area %s", ipaddr_string(&op->ospf6_areaid))); + if (GET_BE_U_4(op->ospf6_areaid) != 0) + ND_PRINT(", Area %s", GET_IPADDR_STRING(op->ospf6_areaid)); else - ND_PRINT((ndo, ", Backbone Area")); - ND_TCHECK(op->ospf6_instanceid); - if (op->ospf6_instanceid) - ND_PRINT((ndo, ", Instance %u", op->ospf6_instanceid)); + ND_PRINT(", Backbone Area"); + if (GET_U_1(op->ospf6_instanceid)) + ND_PRINT(", Instance %u", GET_U_1(op->ospf6_instanceid)); /* Do rest according to version. */ - switch (op->ospf6_version) { + switch (GET_U_1(op->ospf6_version)) { case 3: /* ospf version 3 */ @@ -995,5 +1005,5 @@ ospf6_print(netdissect_options *ndo, return; trunc: - ND_PRINT((ndo, tstr)); + nd_print_trunc(ndo); }